Online Course. Analytic geometry in three dimensions, using vectors. Real-valued functions of two and three variables, partial derivatives, gradient and directional derivatives, level curves and surfaces, maxima and minima. Parametrized curves in space, motion in space, line integrals; applications. After MATH 115, completed AP BC Calculus with a score of a 4 or 5, or with permission of instructor. May not be taken after MATH 121.